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.Management Sciences
Category: Basic Electrical Mcqs
If 1 A current flows in a circuit, the number of electrons flowing through this circuit is
A. 0.625 × 1019
B. 1.6 × 1019
C. 1.6 × 10-19
D. 0.625 × 10-19
(more…)
Insulating materials have the function of___________?
A. preventing a short circuit between conducting wires
B. preventing an open circuit between the voltage source and the load
C. conducting very large currents
D. storing very high currents
Which of the following materials has a negative temperature co-efficient of resistance?
A. Copper
B. Aluminum
C. Carbon
D. Brass
The rating of a fuse wire is always expressed in________________?
A. ampere-hours
B. ampere-volts
C. kWh
D. amperes
Three 6 ohm resistors are connected to form a triangle. What is the resistance between any two corners ___________?
A. 3/2 Q
B. 6 Q
C. 4 Q
D. 8/3 Q
Which quantity should be measured by the voltmeter ?
A. Current
B. Voltage
C. Power
D. Speed
(more…)
Which of the following quantities remain the same in all parts of a series circuit ____________?
A. Voltage
B. Current
C. Power
D. Resistance
When electric current passes through a metallic conductor, its temperature rises. This is due to__________?
A. collisions between conduction electrons and atoms
B. the release of conduction electrons from parent atoms
C. mutual collisions between metal atoms
D. mutual collisions between conducting electrons
If the efficiency of a machine is to be high, what should be low __________?
A. Input power
B. Losses
C. True component of power
D. kWh consumed
E. Ratio of output to input
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